Hiram g



(N9 Model.)

BORING TOOL.

Patented Oct. 15, 189 5.

. 0 8 v IIVI/ 74 A m K llllllllllllllllllllllllllll TED ST TES ATENT mHIRAM e. FOWLER AND WILLIAM H. HILL, OF BLUE RAPIDS, KANSAS.

BORING-TOOL.

SPEQIFIGATION forming part of Letters Patent No. 547,880, dated October15, 1895.

' Application filed February 16, 1895- Serial No. 38,7 (No model.)

To all whom it mat-y concern:

Be it known that we, HIRAM G. FOWLER and WILLIAM H. HILL, citizens ofthe United States, residing at Blue Rapids, in the county of Marshall,State of Kansas, have invented certain newand usefulImprovements inBoring-Tools, of which the following is a description, reference beinghad to the accompanying drawings and to the letters of reference.

marked thereon.

Our invention relates to boring-tools, and more particularly to augersfor usein boringpockets for blasting, our object being to provide aninstrumentby which a pocket can be formed in rock or other material-thatis, by

which a larger hole can be made below a smaller one, so that the chargeof powder or other substance for blasting can be more efficientlypacked.

To this end the invention consists in the various matters hereinafterdescribed, and referred to in the appended claims.

In the accompanying drawings, which illustrate our invention, Figure 1is a perspective of our auger while boring the pocket. Fig. 2 is abottomview of the cutting-point, and Fig. 3 is a perspective of aslightly-modified form of auger.

. Inblasting rock or other substance much better results can be obtainedif a comparatively small bore is made with an enlargement or pocket atits inner end, so that the blasting material can be securely packed andthus more effectually break the rock; Many means have been devised forenlarging borings, but all of these are more or less defective for usein rock or like hard substances because of their complicated structure.We have produced an auger which is effective in operation and at thesame time is made in a strong and simple manner, there being'employed nosprings, levers, or similar parts, which are always liable to get out oforder and more particularly so when boring in rock.

Referring now to the drawings, A repre sents a boring in the rockdesired to be blasted, and B represents the pocket at the inner end ofthis boring. The tool for producing this pocket forms the subject-matterof the present invention. The shank of this tool 0 is preferablytwisted, as shown, to produce the worm c and is provided with thepeculiarlyally grooved, as shown. The side of the tool at d taperstoward-the point. An upwardlyinclined pointed lip E extends from theaugerpoint, said lip projecting beyond the side of the worm c and beingsharpened at e to present a cutting-edge, which edge projects heyondtheside of the worm c. This lip E does not lie in the vertical plane of theanger, but projects forwardly, as shown, atan angle thereto, whereby thetendency for the point eto take into the rock is greatly increased. Anysuitable means, as the angular end F, may be provided for holding theanger in its handle.

In Fig. 3 we have shown a slightly-modified form of auger, in which asecond edge G extends along the inclined portion d to aid in thecutting, as will be hereinafter described.

In practice the smaller boring A is made with a suitable tool, and whenthis has gone to the required depth the tool is withdrawn and the augerforming the subject-matter of the present invention is inserted. Thesmaller boring is made of a diameter about equal to the greatestdiameter of our auger, so that when our anger is inserted it fits thehole rather snugly. The point (1 being off center, it will not when theanger is first inserted enter the center formed by the first boringtool,but will rest at one side of this center. When,however, the anger isturned, the point dis at first carried in a circle, but this pointconstantly seeks to find the old center. This forces the pointedcutting-edge e into the rock, and when the auger-point reaches the oldcenter the point e of the cutting-edge will be describing a circle ofgreater diameter than the old boring, the difference in diameters of thepocket and first boring being determined by the location of the point atand the size of the lip E. In some cases it will be found convenient tomake the first boring with a pointed tool, so that an inclined bottom ispresented, in which case the pointof our auger wheninsorted will restupon the incline, and the auger will be aided in finding the old centerby the inclined portion 01' sliding down the slanting wall left by thefirst tool. The character of the tool used for the first boring is not,however, essential to the successful operation of our auger, it beingpossible to employ our auger in conjunction with a boring having anycharacter of bottom. The grooved point (1 forms a channel for theborings, and these are conveyed along the worm c away from thecuttinghead. In the form of auger shown in Fig. 3 the edge G aids in thecutting. It will thus lie seen that by reason of making the cutterD inthe peculiar manner shown an auger is produced which efiect-ively cutsthe desired pocket, and yet which is simple and durable. The entire toolis preferably made of a single piece of metal, and no springs, levers,or similar parts are presented for breaking or becoming clogged withborings. In addition to this all borings are immediately removed fromthe point, thus leaving its cutting properties unimpeded.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. An auger comprising a shank provided with a cutter, a pointeccentrically placed upon said cutter, and a lip upon said cutter, saidlip being provided with a cutting edge and extending at an angle to thevertical plane of the cutter, which plane includes the cutting edge;substantially as described.

2. An anger comprising a shank provided with a cutter, a pointeccentrically placed upon said cutter, and a lip upon said cutter, saidlip being provided with a cutting edge and extending at an angle .to thevertical plane of the cutter, which plane includes the cutting edge,said cutting edge also projecting beyond the side of the shank;substantially as described.

3. An auger comprising a shank having a cutter tapering in an obliquestraight line at one side to a point eccentrically placed upon saidcutter, a cutting edge along said tapering portion, and a cutting edge Ealso upon said cutter; substantially as described.

4. An auger made of a single piece of material comprising a twistedshank having a cutter tapering at one side to a grooved pointeccentrically placed upon said cutter, and a pointed cutting edgeprojecting beyond the side of the cutter and extending at an angle tothe vertical plane of the cutter; substan tially as described.

5. An auger comprising a worm shank having a cutter, a grooved pointeccentrically placed upon said cutter, and a lip upon said cutter, saidlip being provided with a cutting edge and extending at an angle to thevertical plane of the cutter, which plane includes the cutting edge,said cutting edge also projecting beyond the side of the shank;substantially as described.

6. An auger made of a single piece of terial comprising a twisted shankhaving a cutter tapering at one side to a grooved point eccentricallyplaced upon said cutter, a lip upon said cutter, said lip being providedwith a cutting edge and extending at an angle to the vertical plane ofthe cutter, which plane includes the cutting edge, said cutting edgealso projecting beyond the side of the shank; substantially asdescribed.

In testimony whereof we affix our signatures in presence of twowitnesses.

IIIRAM G. FOWLER. WILLIAM II. IIlLL. Witnesses:

C. O. TEAGUE, GEORGE ROACH.

Corrections in Letters PatentNo. 547,880

It is hereby oertified that in Letters Patent No. 547,880, grantedOctober 15, 1895, Hill, of Blue Rapids, Kansas, Boring-Tools, errorsappear in the printed specification In lines 58-59, the side of the wormc and should be stricken out; on page 2, in line cutter should readshank; and line 61, same vpage,

and that the said Letters upon the application of Hiram Gr. Fowler andWilliam H. for an improvement in I page 1, the words projecting beyond49, the word the syllable ma should be inserted;

requiring correction, as follows:

Patent should be read with these corrections therein that the same mayconform the Patent Office.-

Signed, countersigned, and sealed this 22d day of October, A. D., 1895.

to the record of the case in [SEAL] JNO. M. REYNOLDS,

' Assistant Secretary of the Interior. Oountersigned: I

S, T. FISHER,

Acting Commissioner of Patents.

